{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import sys\n",
    "\n",
    "sys.path.append('../utils')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "\n",
    "from aoc import * # get_input, d4, d8, d4n\n",
    "from atcoder.math import * # crt, pow_mod, inv_mod, floor_sum\n",
    "from atcoder.convolution import * # convolution\n",
    "from atcoder.string import * # suffix_array, lcp_array, z_algorithm\n",
    "from collections import *"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "YEAR = 2021\n",
    "DAY = 11"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "sample = '''5483143223\n",
    "2745854711\n",
    "5264556173\n",
    "6141336146\n",
    "6357385478\n",
    "4167524645\n",
    "2176841721\n",
    "6882881134\n",
    "4846848554\n",
    "5283751526'''"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "inp = get_input(YEAR, DAY)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "def do_transform(inp):\n",
    "    return list(filter(lambda x: len(x) > 0, inp.split('\\n')))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "sample = do_transform(sample)\n",
    "inp = do_transform(inp)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [],
   "source": [
    "def part1(inp):\n",
    "    a = [list(map(int, row)) for row in inp]\n",
    "    n = len(a)\n",
    "    m = len(a[0])\n",
    "    ans = 0\n",
    "    for _ in range(100):\n",
    "        nxt = [[x + 1 for x in row] for row in a]\n",
    "        vis = set()\n",
    "        q = deque()\n",
    "        for i in range(n):\n",
    "            for j in range(m):\n",
    "                if nxt[i][j] > 9:\n",
    "                    q.append((i, j))\n",
    "                    vis.add((i, j))\n",
    "        while len(q) > 0:\n",
    "            i, j = q.popleft()\n",
    "            ans += 1\n",
    "            for di, dj in d8:\n",
    "                ni = i + di\n",
    "                nj = j + dj\n",
    "                if 0 <= ni < n and 0 <= nj < m:\n",
    "                    nxt[ni][nj] += 1\n",
    "                    if nxt[ni][nj] > 9 and (ni, nj) not in vis:\n",
    "                        q.append((ni, nj))\n",
    "                        vis.add((ni, nj))\n",
    "        a = [[0 if x > 9 else x for x in row] for row in nxt]\n",
    "    return ans"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1656"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "part1(sample)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1601"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "part1_ans = part1(inp)\n",
    "part1_ans"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "submit_answer(part1_ans, YEAR, DAY)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "def part2(inp):\n",
    "    a = [list(map(int, row)) for row in inp]\n",
    "    n = len(a)\n",
    "    m = len(a[0])\n",
    "    turn = 0\n",
    "    while True:\n",
    "        turn += 1\n",
    "        nxt = [[x + 1 for x in row] for row in a]\n",
    "        vis = set()\n",
    "        q = deque()\n",
    "        for i in range(n):\n",
    "            for j in range(m):\n",
    "                if nxt[i][j] > 9:\n",
    "                    q.append((i, j))\n",
    "                    vis.add((i, j))\n",
    "        while len(q) > 0:\n",
    "            i, j = q.popleft()\n",
    "            for di, dj in d8:\n",
    "                ni = i + di\n",
    "                nj = j + dj\n",
    "                if 0 <= ni < n and 0 <= nj < m:\n",
    "                    nxt[ni][nj] += 1\n",
    "                    if nxt[ni][nj] > 9 and (ni, nj) not in vis:\n",
    "                        q.append((ni, nj))\n",
    "                        vis.add((ni, nj))\n",
    "        if len(vis) == n * m:\n",
    "            break\n",
    "        a = [[0 if x > 9 else x for x in row] for row in nxt]\n",
    "    return turn"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "195"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "part2(sample)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "368"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "part2_ans = part2(inp)\n",
    "part2_ans"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "submit_answer(part2_ans, YEAR, DAY, level=2)"
   ]
  }
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